/*
 * Copyright (c) 2020, 2021, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */
package com.oracle.truffle.espresso.threads;

public enum KillStatus {
    /**
     * Normal state: no Thread.stop() called, or ThreadDeath has already been thrown.
     */
    NORMAL(false, true),
    /**
     * Thread will throw an asynchronous ThreadDeath whenever possible.
     */
    STOP(true, true),
    /**
     * Thread is terminated, and is calling Thread.exit(). Ignore further stop signals.
     */
    EXITING(false, false),
    /**
     * Thread is uncooperative: needs to be killed with a host exception. Unrecoverable state.
     */
    KILL(true, false);

    private final boolean asyncThrows;
    private final boolean canStop;

    KillStatus(boolean asyncThrows, boolean canStop) {
        this.asyncThrows = asyncThrows;
        this.canStop = canStop;
    }

    public boolean asyncThrows() {
        return asyncThrows;
    }

    public boolean canStop() {
        return canStop;
    }
}
